Bolotettix adik Tan & Muhammad, 2025

Tan, Ming Kai, Muhammad, Amira Aqilah, Damit, Dayang Fazrinah Binti Awg, Japir, Razy, Chung, Arthur Y. C. & Robillard, Tony, 2025, A new species and notes of some pygmy grasshoppers (Orthoptera: Tetrigidae) from Sabah, Zootaxa 5683 (4), pp. 543-560 : 545-548

publication ID	https://doi.org/10.11646/zootaxa.5683.4.5
publication LSID	lsid:zoobank.org:pub:737E85C8-9397-486A-A986-8EED4558797F
DOI	https://doi.org/10.5281/zenodo.17016551
persistent identifier	https://treatment.plazi.org/id/B744AA3D-1B15-FF95-7FBC-FF7D4E59D62C
treatment provided by	Plazi
scientific name	Bolotettix adik Tan & Muhammad
status	sp. nov.

Treatment

Bolotettix adik Tan & Muhammad , sp. nov.

( Figs 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 , 4A View FIGURE 4 )

Material examined. Holotype: EAST MALAYSIA • ♂; Sabah State; Sinipung Hill, near Long Pasia ; N4.44622 E115.71439, 1563.0±13.0 m.a.s.l.; 21 November 2024, 19h32; on foliage of herb near mossy rotten log; coll. M.K. Tan; SBH.24.194 ( FRC). GoogleMaps

Paratypes: EAST MALAYSIA, Sabah State; Sinipung Hill, near Long Pasia • 1♂; same details as holotype; SBH.24.195 ( MNHN) • 2♂; N4.44669 E115.71443, 1598.0± 11.5 m.a.s.l.; 21 November 2024, 20h25; on branch near dead log; coll. M.K. Tan; SBH.24.199, 200 ( ZRC) GoogleMaps .

Generic status. We tentatively place the new species under Bolotettix Hancock, 1907 despite the similarities with species from the genus Zhengitettix Liang, 1994 . Bolotettix is a little-known genus, and the species are in need for taxonomic revision. However, the new species shows similarities with the type species Bolotettix validispinus Hancock, 1907 (see diagnosis). On the other hand, Zhengitettix has not been recorded in Borneo, even though its distribution ranges from Philippines to Indochina.

Diagnosis. The new species is characterised by its small size (BL = 6.59± 0.15 mm; PL = 7.86± 0.23 mm) and marmorated colour patterns, its facial carinae (COS) wide, its pronotal disc with the prozonal carina (CA) and interhumeral carina (CD) thick and strongly raised; the spine of its lateral lobe acute triangular but slightly curved posteriorly and not elongated; EW/VW = 1.4±0.04; PL/PW = 2.36±0.05; HFL/HTL = 1.20±0.04.

From type species Bolotettix validispinus Hancock, 1907 ( Fig. 4B View FIGURE 4 ) from Borneo, the new species differs by its face less slender, its facial carinae (COS) thicker and more widely spaced apart (SW/VW = 0.65 vs. 0.53); EW/VW = 1.46 (vs. 2.00); the prozonal carina (CA) and interhumeral carina (CD) thick and strongly raised, not different from the median carina (as compared to thinner, less distinctly raised compared to its median carina); the spine of its lateral lobe less slender and acute and curved slightly posteriorly; its pronotum slightly shorter (PL/PW = 2.36 vs. 2.44); its colour patterns generally more marmorated (including pronotum and legs).

From Bolotettix parvispinus Hancock, 1913 ( Fig. 4C View FIGURE 4 ) from Borneo, the new species differs by the eyes in lateral view more globular; its face less slender, its facial carinae (COS) thicker and more widely spaced apart (SW/VW = 0.65 vs. 0.34); the prozonal carina (CA) and interhumeral carina (CD) thick and strongly raised, not different from the median carina (as compared to thinner, less distinctly raised compared to its median carina); the spine of its lateral lobe less slender and acute; its lateral lobe with the ventral sinus acute and distinctly narrower in angle than the tegminal sinus (obtuse) (instead of being nearly identical); its colour patterns (including pronotum and legs) generally more marmorated.

From Bolotettix planus Hancock, 1907 ( Fig. 4D View FIGURE 4 ) from Borneo ( Sarawak), the new species differs by the its face less slender, facial carinae (COS) thicker and more widely spaced apart (SW/VW = 0.65 vs. 0.53); its prozonal carina (CA) and interhumeral carina (CD) thick and strongly raised, not different from the median carina (as compared to thinner, less distinctly raised compared to its median carina); the spine of its lateral lobe less slender and acute and curved slightly posteriorly; its humero-apical carina ( CH) more strongly raised; its colour patterns (including pronotum and legs) generally more marmorated.

Etymology. The species name refers to the small size of the species; adik = little sibling in Bahasa Melayu; noun in apposition.

Description. Male. Body small sized for Tetrigidae in general ( Fig. 1 View FIGURE 1 ). Body dark grey with a tint of green.

Head. In frontal view ( Fig. 2A View FIGURE 2 ): Face dark coloured with few faint pale spots and small white nodules. Vertex with transverse and lateral carinae faintly elevated, not elevated above dorsal margin of compound eyes. Frontal costa long, bifurcates at mid of compound eyes height, just between the paired lateral ocelli. Scutellum in its widest part wider than antennal groove. Scutellum forms shallow concavity, becoming wider ventrally. Antennal grooves with upper margins visible above lower margins of compound eyes. Antennae filiform, 13-segmented; antennal bases at level of lower margin of eyes; 1stAW/SW = 0.53.Antennal segment dark coloured. Median ocellus ventrad of antennal grooves. Compound eyes oblongly ovoid. Generally dark grey with some pale-yellow patterns. Mouthparts mostly dark coloured; maxillary palps with segments grey with margins pale. In dorsal view ( Fig. 2B View FIGURE 2 ): Fastigium of vertex with deep concavities behind lateral carinae, not produced in front of eyes, EW/VW = 1.46. Fastigium with anterior margin truncated, median carina not produced in front of anterior margin of fastigium; lateral carinae elevated; subocular lobes distinct. Compound eyes oval. In lateral view ( Figs 2C, 2D View FIGURE 2 ): Compound eyes hemispheric, exerted above vertex. Frontal ridge (or scutellum) distinctively produced to form two broadly rounded lobes; the two lobes are of about equal height. Genae dark coloured, with pale-yellow transverse band ventrad of compound of eye.

Pronotum. Finely nodulose, long (macropronotal state), surpassing abdominal apex, hind femur, but reaching only base of hind tibiae ( Fig. 1 View FIGURE 1 ). In dorsal view ( Fig. 2B View FIGURE 2 ): Anterior margin straight; posterior process with truncated apex. Dorsal plate of pronotum dark grey with tint of brown and pale yellow; lateral margins after prozona distinctly red or orange with tint of yellow. Nodules typically pale yellow. Prozonal carinae diverge posteriorly. Pronotal disc with carinae prozonal carina (CA) and interhumeral carina (CD) well defined, thick and strongly raised. Lateral lobes of pronotum mostly dark grey with anterior margin with pale patch that continues with pale-yellow transverse band ventrad of compound of eye, and with smaller pale patch at ventral margin; lower part more pale coloured, directed laterally, produced into triangular spine. Spine of lateral lobe triangular and acute and curved slightly posteriorly, apex pale coloured. In lateral view ( Figs 2C, 2D View FIGURE 2 ): Median carina of pronotum substraight. Prozonal carinae well defined. Hind margin of lateral lobe of pronotum bisinuate, tegminal (dorsal) sinus less deep than ventral sinus, distinctly more obtuse in angle than ventral sinus. Anterior margin straight, then curved broadly into ventral margin.

Wings. Tegmen elongated, oval with apical margin obtuse or subacute; TL/TW = 2.55 ( Fig. 2E View FIGURE 2 ). Hind wings long, not surpassing apex of pronotum ( Fig. 1 View FIGURE 1 ).

Legs. Fore and mid femora compressed laterally; upper carinae finely serrated. Upper and lower carinae of middle femur slightly sinuated and finely serrated ( Figs 2C, 2D, 2F View FIGURE 2 ). Fore and mid legs dark grey, with sparse palecoloured marmoration ( Figs 2C, 2D, 2F View FIGURE 2 ). First segment of fore and mid tarsi dark grey, third segment with dark grey with incomplete white ring ( Fig. 2F View FIGURE 2 ). Hind femur with ventral third unicolourous black or dark grey, otherwise dark grey with white or pale patches; 3.16 times as long as wide. Hind tibia mostly black. Upper side of hind tibia with 5–7 spines on the inner and outer margins, each; spines can be indistinct with minute denticles between spines. Ventral surface of first tarsal segment with 3 pads. Length of first tarsal segment of hind legs 0.75 times the length of third segment (without claws). First segment of hind tarsus mostly white, except apex; second segment mostly dark coloured, third segment white except at apex.

Abdominal apex. Tergite generally dark grey; sternites, including subgenital plate generally pale coloured. Subgenital plate in ventral view triangular, with apex of plate slightly excised; in lateral view slender and elongated. Cerci stout basally with pointed apex.

Variations. Some individual having a darker colouration, but patterns remain consistent.

Measurements. See Table 1.